I used the self stick foam cove, I also duct taped it where it meets the pool wall. I would use it again, and in the 7 years I have not had an algae problem that I know of.

Algae between the foam and wall? How would anyone know that unless they removed the foam cove, do you mean algae between the cove and liner? Again, I see no algae. When I replaced my liner, I had algae under the liner growing on the sand base but only knew because I removed the old liner. It makes a nice transition from wall to floor and looks professional, unlike sand coves.